N-(2-cyanoethenyl)sulfonamides having two functionalities and toner compositions containing them

Abstract

There is provided an electrostatographic toner comprising a polymeric binder and a charge-control agent having the general structure: ##STR1## wherein A, B, R 2 , and R 3 are defined in the specification.

We claim: 
     
       1. A toner comprising a polymeric binder and a charge control agent having the general structure: ##STR10## wherein one of A and B is either: ##STR11## and the other of A and B is the other of: ##STR12## R 1  is selected from the group consisting of hydrogen; alkyl containing from 1 to 20 carbons; cycloalkyl containing from 3 to 18 carbons; unsubstituted aromatic ring systems; aromatic ring systems substituted with one or more alkyl, halo, nitro, cyano, hydroxy, alkoxy, carboxy, carboalkoxy, amino, dialkylamino, acyl, trihalomethyl or alkysulfonyl; heteroaromatic ring systems; alkanoyl; alkoxycarbonyl; aminocarbonyl; alkylaminocarbonyl; aralkylaminocarbonyl; alkylsulfonyl; aroyl; aryloxycarbonyl; arylaminocarbonyl; arylsulfonyl; and arylsulfonyl substituted with one or more alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl; R 2  is independently selected from the group consisting of alkyl containing from 1 to 20 carbons; cycloalkyl containing from 3 to 18 carbons; unsubstituted aromatic ring systems; aromatic ring systems substituted with one or more alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl; heteroaromatic ring systems; and, when R 2  is attached to the ethenyl group, R 2  is optionally ethenyl, unsubstituted or substituted with alkyl containing from 1 to 20 carbons or aryl containing from 5 to 10 carbons or aryl substituted with alkyl, hydroxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl, or alkylsulfonyl; and   R 3  is selected from the group consisting of alkylene; arylene; arylenedialkylene; alkylenediarylene; oxydialkylene; and oxydiarylene;   wherein each aromatic and heteroaromatic ring system has a solitary ring or 2 to 3 linked or fused rings, and containing from 3 to 34 carbons.   
     
     
       2. The toner according to claim 1 wherein said charge control agent has the general structure: ##STR13## wherein X is hydrogen, alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, halo, nitro, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl and R 1  is as defined above; and n is an integer of from 0 to 5. 
     
     
       3. A toner according to claim 1 wherein said polymeric binder is a styrenic/acrylic copolymer having a glass transition temperature in the range of about 50° C. to about 100° C. 
     
     
       4. A toner according to claim 3 wherein said polymeric binder is a copolymer of styrene and n-butyl acrylate, crosslinked with divinyl-benzene. 
     
     
       5. The toner according to claim 1 further comprising a colorant. 
     
     
       6. A developer comprising a toner according to claim 1 and a carrier. 
     
     
       7. A developer according to claim 6 wherein said carrier is strontium ferrite coated with dehydrofluorinated and oxidized fluorocarbon.